40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 48 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  3660   Wed Oct 6 14:49:54 2010 ranaSummaryloreSteve on the sea   jacques.jpg 
  3685   Sun Oct 10 18:09:02 2010 KojiSummaryCOCPhase map interferometer calibration for the data on Oct 8th, 2010 Summary:
Calibration
of the phase map interferometer was calculated
for the data on Oct 8th, 2010.
 calibration.pdf 
  3686   Sun Oct 10 18:28:25 2010 kiwamuSummarySUSITMX OSEM offsetsBecause of the in-vac work on Oct. 4th
(see this
entry) , ITMX's OSEM offsets were
 OSEM.png 
  3689   Mon Oct 11 16:09:10 2010 yutaSummarySUScurrent OSEM outputsBackground:
 The output range of the OSEM
is 0-2V.
  
  3694   Mon Oct 11 23:55:25 2010 Joonho LeeSummaryElectronicsCCD cables for output signalToday
I checked all the CCD cables which is connected
output channels of the VIDEOMUX.
  
  3738   Mon Oct 18 18:33:46 2010 KojiSummaryCOCSummary of the main mirrors & their phasemap measurementI have made a summary web page for the
40m upgrade optics.
https://nodus.ligo.caltech.edu:30889/40m_phasemap/
  
  3739   Mon Oct 18 22:11:32 2010 Joonho LeeSummaryElectronicsCCD cables for input signalToday
I checked all the CCD cables which is connected
input channels of the VIDEOMUX.
  
  3749   Thu Oct 21 01:11:48 2010 ranaSummaryComputerselog change and rossa texI deleted
a bunch of categories from the elogd.cfg
  
  3753   Thu Oct 21 13:05:19 2010 KojiSummaryComputerselog change and rossa texThis is cool    
  3765   Fri Oct 22 19:53:27 2010 yutaSummaryCDSconversion failure in digital filters(Rana, Joe, Yuta)

We now understand that we never succeeded
  
  3770   Sat Oct 23 14:42:01 2010 yutaSummaryCDSdamped MC suspensionsAfter replacing filters, MC suspensions
damped  last night.
Further measurement next time.
 dam.png 
  3771   Sun Oct 24 18:06:35 2010 kiwamuSummaryLockingsetup for green beat   green_beat_note.png 
  3774   Mon Oct 25 02:14:38 2010 KojiSummaryLockingsetup for green beat- What is the actual photocurrent for the
beam1 and beam2? We don't care how much power
do you have before the BS, but care how much
  
  3815   Thu Oct 28 23:17:15 2010 yutaSummaryCDS[EMERGENCY] accidentally deleted daqdRana showed me that if c1sus machine runs
c1mcs stuff(and c1x02 stuff) only, we can
use dataviewer without crashing fb.
  
  3816   Fri Oct 29 01:18:03 2010 KojiSummarySUSPRM standoff glued[Suresh Koji]
The standoff glued. The incandescent
lamp set for curing the epoxy.
 IMG_3674.jpg 
  3821   Fri Oct 29 11:25:15 2010 josephb, yutaSummaryCDS[EMERGENCY] accidentally deleted daqdProblem:
Missing daqd file, i.e. the framebuilder
executable.
  
  3828   Fri Oct 29 18:37:33 2010 yutaSummaryCDSdaqd and current CDS statusBackground:
  Before Joe left(~ 1 hour ago),
fb was working for a while. But after he
 06-25-2009.NN_24ThreatLevel.GJH2L69BK.1.jpg 
  3829   Sat Oct 30 05:27:53 2010 yutaSummaryCDSCDS time delay measurementMotivation:
  We want to know the time delay
of CDS in the IOP scheme.
 delaysetup.pngCDSdelay.png 
  3830   Sat Oct 30 14:35:43 2010 KojiSummaryCDSCDS time delay measurementUnsatisfactory.
Neglecting the digital anti-imaging
 CDS_system_investigation_090323.pdf 
  3831   Sun Oct 31 00:19:35 2010 ranaSummaryComputer Scripts / ProgramsHP3563A netGPIB functionI've wheeled the old HP audio frequency
signal analyzer into the control room to
debug the GPIB/python interface. The wireless
  
  3838   Mon Nov 1 15:47:15 2010 yutaSummaryCDSCDS time delay measurementBackground:
  I measured CDS time delay last
week, but because of my lack of understanding
 downupsampling.pngCDSdelay2.png 
  3839   Mon Nov 1 16:43:24 2010 KojiSummaryCDSCDS time delay measurementUm, Beautiful.   
  3841   Mon Nov 1 19:32:08 2010 yutaSummaryCDSfb crashed? during c1ioo and c1mcs connection at ASCFrame builder
died again!!
  
  3849   Wed Nov 3 02:23:11 2010 yutaSummaryCDSchecking whitening filter boardSummary:
  Last night, I found that some
of the input channels have wrong hardware
 MC3SEN.png 
  3850   Wed Nov 3 02:37:39 2010 yutaSummaryGreen Lockingcoarse locked green beat frequency(Kiwamu, Yuta)

 Screenshot_LowFreqLock.png 
  3851   Wed Nov 3 03:00:47 2010 KojiSummaryGreen Lockingcoarse locked green beat frequencyWow! Great guys!!   
  3852   Wed Nov 3 09:32:00 2010 ranaSummaryCDSEurocard board swapping When swapping Eurocard boards, it
is safest to first turn down the power supplies
and then do the swapping. 
  
  3855   Wed Nov 3 17:01:01 2010 josephbSummaryCDSComparison of RFM read times Problem:
RFM reads are slow.  Rolf has
said it should take 2-3 microseconds per
  
  3869   Fri Nov 5 15:20:18 2010 josephb, alexSummaryCDS40m computer slow down solvedProblem:
The 40m computers were responding
sluggishly yesterday, to the point of being
  
  3872   Fri Nov 5 21:49:12 2010 ranaSummaryCDS40m computer slow down solved


   
        
            
  
  3875   Sat Nov 6 01:54:15 2010 FrankSummaryComputersvirus definition file update on laptop for dinocami took
some pictures with the dinocam this afternoon.
I used the laptop computer next to it using
  
  3876   Sat Nov 6 07:26:54 2010 yutaSummaryIOOreduced common mode displacement of the beam through MC1 to MC3(Koji, Suresh, Yuta)

Summary:
 A2LMCalign.png 
  3877   Sat Nov 6 16:13:14 2010 ranaSummaryCDS40m computer slow down solvedAs part of the effort to debug what was
happening with the slow computers, I disabled
the auto MEDM snapshots process that Yoichi/Kakeru
  
  3883   Tue Nov 9 05:40:12 2010 yutaSummaryIOOMC aligning going on(Suresh, Yuta)

Background:
 MCalignNov9.png 
  3884   Wed Nov 10 02:51:35 2010 yutaSummaryIOOlimitation of current MC aligning(Suresh, Yuta)

Summary:
 MCalignNov9.png 
  3885   Wed Nov 10 11:46:19 2010 KojiSummaryIOOlimitation of current MC aligningIt didn't make sense in several points.
1. Is the Faraday aperture really
3mm? The beam has the gaussian radius of
  
  3886   Wed Nov 10 12:21:18 2010 yutaSummaryIOOlimitation of current MC aligning1. We didn't measure the aperture size
last night. We have to check that.
  
  3887   Wed Nov 10 14:28:33 2010 KojiSummaryIOOlimitation of current MC aligning1. Look at the Faraday.
2. Look at the wiki. There is the
optical layout in PNG and PDF.
  
  3891   Thu Nov 11 04:32:53 2010 yutaSummaryCDSfound poor contact of DAC cable, previous A2L results were wrong(Koji, Jenne, Yuta)

  
  3892   Thu Nov 11 05:56:04 2010 yutaSummaryIOOsetting up temporary oplev for coil balancing of MCs(Suresh, Yuta)

Background:
 MC2coils.png 
  3895   Thu Nov 11 11:51:30 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrongThe cause is apparent!
The connectors on the cables are wrong!
  
  3901   Thu Nov 11 23:35:23 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrong[Koji / Yuta]
There were
 IMG_3698.jpgbad-boys.pngIMG_3705.jpgIMG_3706.jpg 
  3924   Mon Nov 15 15:02:00 2010 KojiSummaryPSLpower measurements around the PMC[Valera Yuta Kiwamu Koji]
Kiwamu burtrestored c1psl.  We measured
the power levels around the PMC.
  
  3941   Wed Nov 17 20:44:59 2010 yutaSummaryCDSno QPD channels on c1sus machine today(Joe, Suresh, Yuta)

  
  3948   Thu Nov 18 16:32:21 2010 yutaSummaryCDScurrent damping status for all optics c1sus handlesSummary:
   I set Q-values for each
ringdown of PRM, BS, ITMX, ITMY, MC1, MC2,
 c1susdampings.png 
  3950   Thu Nov 18 17:42:20 2010 Joonho LeeSummaryElectronicsCCD cables.I finished
the direct measurement of cable impedances.
Moreover,
 Upgrade_plan_(Nov18).pdf 
  3961   Sat Nov 20 03:37:11 2010 yutaSummaryCDSCDS time delay measurement - the ripple(Koji, Joe, Yuta)

Motivation:
 c1tst16Kdelay.png 
  3963   Mon Nov 22 13:16:52 2010 josephbSummaryCDSCDS Plan for the weekCDS Objectives for the Week:
Monday/Tuesday:
1) Investigate ETMX SD sensor problems
2) Fully check out the ETMX suspension
  
  3976   Tue Nov 23 11:32:03 2010 JoonhoSummaryElectronicsRF distribution unit.The last time(Friday) I made an arrangement
for RF distribution unit.
I am making RF distribution unit
 Frequency_Distribution_Unit_Arrangement.jpg 
  3982   Tue Nov 23 23:13:40 2010 kiwamuSummaryCDSplan: we will install C1LSC [Joe, Suresh, Kiwamu]
 We
  
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